Galaxies spatially coincident with the JKCS 041 X-ray emission display a red sequence at z~2.2 - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Memorie della Societa Astronomica Italiana Supplementi Année : 2012

Galaxies spatially coincident with the JKCS 041 X-ray emission display a red sequence at z~2.2

Résumé

New deep z'-J data readly show a narrow red sequence co-centered with, and similary concentrated to, the extended X-ray emission of the cluster of galaxies JKCS 041. The JKCS 041 red sequence is 0.32±0.06 mag redder in z'-J than the red sequence of the zspec=1.62 IRC0218A cluster, putting JKCS 041 at z≫1.62. The colour difference of the two red sequences gives a red-sequence based redshift of z=2.20±0.11 for JKCS 041, where the uncertainty accounts for uncertainties in stellar synthesis population models, in photometric calibration and in the red sequence colour of both JKCS 041 and IRC0218A clusters.
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hal-03742270 , version 1 (02-08-2022)

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S. Andreon, Marc Huertas. Galaxies spatially coincident with the JKCS 041 X-ray emission display a red sequence at z~2.2. Memorie della Societa Astronomica Italiana Supplementi, 2012, 19, pp.271. ⟨hal-03742270⟩
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